Semiconductor device package and acoustic device including the same

ABSTRACT

A wireless earphone comprises a battery, a speaker and a chamber/space. The battery has a first surface, a second surface opposite the first surface, and a third surface extended between the first surface and the second surface. The battery is disconnected from any protecting circuits. The speaker is disposed adjacent to the first surface of the battery. The chamber/space is defined by the battery and the speaker. The chamber/space is devoid of any electronic component.

BACKGROUND 1. Technical Field

The present disclosure relates generally to a semiconductor devicepackage, and more particularly, the present disclosure relates to anacoustic device having the semiconductor device package.

2. Description of the Related Art

As technology advances, various circuits or modules can be integratedinto one electronic device, e.g. an acoustic device (e.g. an earphone ora wireless earphone) to perform multifunction. However, miniaturizationof the electronic device may adversely affect performance of theelectronic device.

SUMMARY

In some embodiments, the present disclosure provides a wirelessearphone. The wireless earphone comprises a battery, a speaker and achamber/space. The battery has a first surface, a second surfaceopposite the first surface, and a third surface extended between thefirst surface and the second surface. The battery is disconnected fromany protecting circuits. The speaker is disposed adjacent to the firstsurface of the battery. The chamber/space is defined by the battery andthe speaker. The chamber/space is devoid of any electronic component.

In some embodiments, the present disclosure further provides a wirelessearphone. The wireless earphone comprises a speaker, a battery and afirst semiconductor device package. The battery is separated from thespeaker and having a first surface, a second surface opposite the firstsurface, and a third surface extended between the first surface and thesecond surface. The first semiconductor device package is disposedadjacent to the second surface or the third surface of the battery. Thefirst semiconductor device package comprises a substrate, a feedingstructure and an encapsulant. The substrate has a first surface and asecond surface opposite the first surface. The feeding structure isdisposed on the first surface. The encapsulant encapsulates the wholesecond surface of the substrate.

BRIEF DESCRIPTION OF THE DRAWINGS

Aspects of some embodiments of the present disclosure are readilyunderstood from the following detailed description when read with theaccompanying figures. It is noted that various structures may not bedrawn to scale, and dimensions of the various structures may bearbitrarily increased or reduced for clarity of discussion.

FIG. 1A illustrates an exploded view of an acoustic device in accordancewith some embodiments of the present disclosure.

FIG. 1B illustrates a perspective view of an assembly of the acousticdevice as shown in FIG. 1A.

FIG. 1C illustrates a side view of the assembly of the acoustic deviceshown in FIG. 1B.

FIG. 2A illustrates an exploded view of an acoustic device in accordancewith some embodiments of the present disclosure.

FIG. 2B illustrates a perspective view of an assembly of the acousticdevice as shown in FIG. 2A.

FIG. 2C illustrates a side view of the assembly of the acoustic deviceshown in FIG. 2B.

FIG. 2D illustrates another side view of the assembly of the acousticdevice shown in FIG. 2B.

FIG. 3A illustrates an exploded view of electronic components of anacoustic device in accordance with some embodiments of the presentdisclosure.

FIG. 3B illustrates an assembly of the electronic components of theacoustic device in accordance with some embodiments of the presentdisclosure.

FIG. 3C illustrates an exploded view of an acoustic device in accordancewith some embodiments of the present disclosure.

FIG. 3D illustrates a side view of an assembly of the acoustic device asshown in FIG. 3C.

FIG. 4A illustrates an acoustic device in accordance with someembodiments of the present disclosure plugged in a human ear.

FIG. 4B illustrates an acoustic device in accordance with some otherembodiments of the present disclosure plugged in a human ear.

FIG. 4C illustrates the acoustic device shown in FIG. 4B falls out ofthe human ear.

FIG. 5 illustrates a cross-sectional view of a semiconductor devicepackage of the acoustic device as shown in FIGS. 1A and 2A.

FIG. 6A illustrates frequency response of an earphone pair in accordancewith an embodiment of the present disclosure.

FIG. 6B illustrates frequency response of another earphone pair inaccordance with an embodiment of the present disclosure.

FIG. 7 illustrates an exploded view of an acoustic device in accordancewith some embodiments of the present disclosure.

DETAILED DESCRIPTION

FIG. 1A illustrates an exploded view of an acoustic device 1 inaccordance with some embodiments of the present disclosure. The acousticdevice 1 includes a speaker 10, a battery 11, a semiconductor devicepackage 12, an interconnect structure 13 and a housing 14. The speakerhas a surface 10 a and a surface 10 b opposite to the surface 10 a. Thebattery 11 has a surface 11 a, a surface 11 b opposite the surface 11 a,and a surface 11 c extended between the surface 11 a and the surface 11b. The battery 11 is disconnected from any protecting circuits. Thebattery 11 includes a coin-like package. The battery 11 includes noaluminum cover. The capacity of the battery 11 may be larger than 60mAh. For example, the battery 11 may include capacity of approximately63 mAh.

The speaker 10 is disposed adjacent to the surface 11 a of the battery11. The surface 10 a of the speaker 10 faces with the surface 11 a ofthe battery 11. The surface 11 a of the battery 11 may be a cathode ofthe battery 11. The structure of the semiconductor device package 12 isillustrated in the cross-sectional view of the semiconductor devicepackage 5 in FIG. 5 . The speaker 10 is connected to the semiconductordevice package 12 by wires 15. The wires 15 do not penetrate the battery11. The speaker 10 is separated from the battery 11 by a chamber/spaceS1. The housing 14 encloses the speaker 10, the battery 11, thesemiconductor device package 12, and the interconnect structure 13. Theinterconnect structure 13 connects the battery 11 and the semiconductordevice package 12. The interconnect structure 13 includes flexible printcircuit (FPCs) or other interconnect structures.

FIG. 1B illustrates a perspective view of an assembly of the acousticdevice 1 as shown in FIG. 1A. The semiconductor device package 12 isdisposed adjacent to the surface 11 c of the battery 11. Thesemiconductor device package 12 is disposed adjacent to the surface 11 bof the battery 11. The semiconductor device package 12 is electricallyconnected to the surface 11 c of the battery 11 by the interconnectstructure 13. The speaker 10 is separated from the surface 11 a of thebattery 11 by the chamber/space S1. The chamber/space S1 is devoid ofelectronic components. The chamber/space S1 may have a plate forseparating the speaker and the battery 11. The chamber/space S1 may haveconductive wires therein. The chamber/space S1 may have solelyconductive wires therein. The chamber/space S1 may have no activecomponents. The chamber/space S1 may have no passive components. A spacebetween the surface 11 b of the battery 11 and the housing 14 is devoidof any electronic component.

The semiconductor device package 12 is disposed between the housing 14and the surface 11 c of the battery 11. The semiconductor device package12 is disposed between the housing 14 and the surface 11 b of thebattery 11. The speaker 10 has a surface 10 a facing the surface 11 a ofthe battery 11. The semiconductor device package 12 is disposed betweenthe housing 14, the surface 11 c of the battery 11 and the surface 10 aof the speaker 10. The semiconductor device package 12 is disposedbetween the housing 14, the surface 11 b of the battery 11 and thesurface 10 a of the speaker 10. The semiconductor device package 12 issurrounded by the housing 14, the surface 11 c of the battery 11 and thesurface 10 a of the speaker 10. The semiconductor device package 12 issurrounded by the housing 14, the surface 11 b of the battery 11 and thesurface 10 a of the speaker 10. The semiconductor device package 12 isdisposed in a chamber/space defined by the housing 14, the surface 11 cof the battery 11 and the speaker 10. The semiconductor device package12 is disposed in a chamber/space defined by the housing 14, the surface11 b of the battery 11 and the speaker 10. The housing 14 encloses thespeaker 10, the battery 11 and the semiconductor device package 12. Thehousing 14 has an end 14 a and an end 14 b opposite the end 14 a. Anopening (not shown in FIG. 1B) may be disposed on the end 14 a. Antennapatterns 16 are formed on the housing 14. A feeding point (not denotedin FIG. 1B) of the semiconductor device package 12 is in contact withthe antenna patterns 16.

Referring again to FIG. 1B, assuming the speaker 10 can have a width ordiameter of approximately 6 mm, a maximum distance Z1 between the end 14a (which can be fitted or plugged into an ear) and the end 14 b alongthe z axis can be equal to or less than 23 mm. For example, assuming thespeaker 10 can have a width or diameter of approximately 6 mm, adistance Z1 between the end 14 a (which can be fitted or plugged into anear) and the end 14 b along the z axis can be equal to or less than 20mm. Accordingly, the semiconductor device package 12 can facilitateminiaturization of the acoustic device 1. Arrangement of thesemiconductor device package 12 can facilitate miniaturization of theacoustic device 1.

For example, assuming the speaker 10 can have a width or diameter ofapproximately 10 mm, a distance Z1 between the end 14 a (which can befitted or plugged into an ear) and the end 14 b along the z axis can beequal to approximately 23 mm.

Referring to FIG. 1C, assuming the speaker 10 can have a width ordiameter of approximately 6 mm, a maximum distance of the acousticdevice 1 along the x axis can be equal to or less than 17 mm.Additionally, assuming the speaker 10 can have a width or diameter ofapproximately 6 mm, a maximum distance of the acoustic device 1 alongthe y axis can be equal to or less than 20 mm.

FIG. 2A illustrates an exploded view of an acoustic device 2 inaccordance with some embodiments of the present disclosure. The acousticdevice 2 includes a speaker 20, a battery 21, a semiconductor devicepackage 22, an interconnect structure 23 and a housing 24. The speakerhas a surface 20 a and a surface 20 b opposite to the surface 20 a. Thebattery 21 has a surface 21 a, a surface 21 b opposite the surface 21 a,and a surface 21 c extended between the surface 21 a and the surface 21b. The battery 21 is disconnected from any protecting circuits. Thebattery 21 includes a coin-like package. The battery 21 includes noaluminum cover. Because the battery 11 includes special structures (e.g.fuses) and special recipes of electrolytes, the battery 11 does notinflate or explode after use for a while.

The speaker 20 is disposed adjacent to the surface 21 a of the battery21. The surface 20 a of the speaker 20 faces with the surface 21 a ofthe battery 21. The surface 21 a of the battery 21 may be a cathode ofthe battery 21. The structure of the semiconductor device package 22 maybe illustrated in the cross-sectional view of the semiconductor devicepackage 5 in FIG. 5 . The speaker 20 is separated from the battery 21 bya chamber/space S2. The housing 24 encloses the speaker 20, the battery21, the semiconductor device package 22, and the interconnect structure23. The interconnect structure 23 connects the battery 21 and thesemiconductor device package 22. The interconnect structure 23 includesflexible print circuit (FPCs) or other interconnect structures.

FIG. 2B illustrates a perspective view of an assembly of the acousticdevice 2 as shown in FIG. 2A. The semiconductor device package 22 isdisposed adjacent to the surface 21 c of the battery 21. Thesemiconductor device package 22 is disposed adjacent to the surface 21 bof the battery 21. The semiconductor device package 22 is electricallyconnected to the surface 21 c of the battery 21 by the interconnectstructure 23. The speaker 20 is separated from the surface 21 a of thebattery 21 by the chamber/space S2. The chamber/space S2 is devoid ofelectronic components. The chamber/space S2 may include a plate forseparating the speaker and the battery 11. The chamber/space S2 mayinclude conductive wires therein. The chamber/space S2 may includesolely conductive wires therein. The chamber/space S2 may include noactive components. The chamber/space S2 may include no passivecomponents. A space (not denoted in FIG. 2B) between the surface 21 b ofthe battery 21 and the housing 24 is devoid of any electronic component.

The semiconductor device package 22 is disposed between the housing 24and the surface 21 c of the battery 21. The semiconductor device package22 is disposed between the housing 24 and the surface 21 b of thebattery 21. The speaker 20 has a surface 20 a facing the surface 21 a ofthe battery 21. The semiconductor device package 22 is disposed betweenthe housing 24, the surface 21 c of the battery 21 and the surface 20 aof the speaker 20. The semiconductor device package 22 is disposedbetween the housing 24, the surface 21 b of the battery 21 and thesurface 20 a of the speaker 20. The semiconductor device package 22 issurrounded by the housing 24, the surface 21 c of the battery 21 and thesurface 20 a of the speaker 20. The semiconductor device package 22 issurrounded by the housing 24, the surface 21 b of the battery 21 and thesurface 20 a of the speaker 20. The semiconductor device package 22 isdisposed in a chamber/space defined by the housing 24, the surface 21 cof the battery 21 and the speaker 20. The semiconductor device package22 is disposed in a chamber/space defined by the housing 24, the surface21 b of the battery 21 and the speaker 20. The housing 24 encloses thespeaker 20, the battery 21 and the semiconductor device package 22. Thehousing 24 has an end 24 a and an end 24 b opposite the end 24 a.Antenna patterns 26 are formed on the housing 24. A feeding point (notdenoted in FIG. 2B) of the semiconductor device package 22 is in contactwith the antenna patterns 26.

Referring again to FIG. 2B, assuming the speaker 10 can have a width ordiameter of approximately 10 mm, a maximum distance Z2 between the end24 a (which can be fitted or plugged into an ear) and the end 24 b alongthe z axis can be equal to or less than 23 mm. Because the semiconductordevice package 22 is used, a larger speaker can be accommodated and usedin the acoustic device 2, which can improve the acoustic performance ofthe acoustic device 2. Accordingly, the semiconductor device package 22can facilitate acoustic performance of the acoustic device 2.Arrangement of the semiconductor device package 22 can facilitateacoustic performance of the acoustic device 2.

The connector 23 may include a sensor (not denoted in FIG. 2B) disposedon the connector 23 and located between the housing 24 and the surface21 c of the battery 21. The sensor may be a proximity sensor. Theproximity sensor determines a working mode (after being worn) or astandby mode. There may be an opening (not denoted in FIG. 2B) on thehousing 24 corresponding to a sensing surface (not denoted in FIG. 2B)of the proximity sensor.

The connector 23 may include another sensor 25 disposed on the connector23 and located between the housing 24 and the surface 21 a of thebattery 21. The sensor 25 may be a heart rate sensor. The heart ratesensor may sense the heart rate of a person wearing the acoustic device2. There may be an opening (not denoted in FIG. 2B) on the housing 24corresponding to a sensing surface (not denoted in FIG. 2B) of thesensor 25.

Referring to FIG. 2C, assuming the acoustic device 2 includes thespeaker having a width or diameter of approximately 10 mm, a maximumdistance Y1 of the acoustic device 2 along the y axis can be equal to orless than 24 mm.

Referring to FIG. 2D, assuming the acoustic device 2 includes thespeaker having a width or diameter of approximately 10 mm, a maximumdistance X1 of the acoustic device 2 along the x axis can be equal to orless than 18 mm.

FIG. 3A illustrates an exploded view of electronic components of anacoustic device. Circuit boards 31, 32 and 33 of an acoustic device areconnected by an interconnect structure 34. Electronic components areformed on the circuit boards 31, 32 and 33. The interconnect structure34 may include FPCs or other interconnect structures. A battery 35 canbe provided in the acoustic device.

FIG. 3B illustrates an assembly of the electronic components of theacoustic device in accordance with some embodiments of the presentdisclosure. The circuit boards 31, 32 and 33 are stacked. The thicknessof the stack is T1. The circuit boards 31 and 32 and the interconnectstructure 34 surround a battery 35. The circuit boards 32 and 33 and theinterconnect structure 34 surround a mechanical component 36.

FIG. 3C illustrates an exploded view of an acoustic device 3. Theacoustic device 3 may include a speaker 30, circuit boards 31, 32 and33, the interconnect structure 34, a battery 35 and a housing 37. Thecircuit board 33 is disposed between the speaker 30 and the battery 35,which causes electromagnetic interference to the speaker 30 and thusdegrades the acoustic performance of the acoustic device 3. The housing37 encloses the speaker 30, the circuit boards 31, 32 and 33, theinterconnect structures 34, and the battery 35. Antenna patterns 38 areformed on the housing 37. A feeding point (not denoted in FIG. 3C) onthe circuit board 33 is in contact with the antenna patterns 38.

FIG. 3D illustrates a side view of an assembly of the acoustic device 3shown in FIG. 3C. In some embodiments, assuming the diameter of thespeaker inside the acoustic device 3 is 6 mm, the maximum distance Z3between an end 37 a (which can be fitted or plugged into an ear) and anend 37 b is equal to or larger than 23 mm. Because the thickness T1shown in FIG. 3B is larger than the distance between an end 12 a of thesemiconductor device package 12 and the end 11 a of the battery 11 alongthe z axis in FIG. 1B, the maximum distance Z3 of the acoustic device 3is larger than the maximum distance Z1 of the acoustic device 1.

Referring to FIG. 4A, the acoustic device 1 shown in FIG. 1B is pluggedinto a human ear. The center of gravity CM1 may be adjacent or close tothe end 14 b. Due to the miniaturization of the acoustic device 1, whenplugging the acoustic device 1 into the ear, the acoustic device 1 canbe in contact with a point P of the ear. Accordingly, the acousticdevice 1 can have a relatively good support of the ear. Accordingly, theacoustic device 1 would not easily fall out of the even when the personwearing the acoustic device 1 is moving or sweating.

Referring to FIG. 4B, the acoustic device 3 shown in FIG. 3D is pluggedinto a human ear. The center of gravity CM2 may be adjacent or close tothe end 37 b.

The acoustic device 3, which may have a relatively great size, may havea major portion (except the plug) that is floating. The acoustic device3 may be spaced from the point P of the human ear. A distance D1 isbetween the top surface of the acoustic device 3 and the human ear.

FIG. 4C illustrates that the acoustic device 3 starts falling off theear when the person wearing the acoustic device 3 swears, moves orchange positions. The falling of the acoustic device 3 may be resultedfrom an unstable state as shown in FIG. 4B, in which the center ofgravity CM2 may cause the acoustic device 3, which lacks support of theear, relatively easy to fall out of the ear.

It is contemplated that a distance D2 from the top surface of theacoustic device 3 and the human ear is increasing due to the falling ofthe acoustic device 3. The distance D2 is larger than the distance D1.

FIG. 5 illustrates a cross-sectional view of the semiconductor devicepackage 12 of the acoustic device 1 as shown in FIG. 1A. A semiconductordevice package 5 can include a substrate 50, electronic components 51,52, 55, an encapsulant 53, a feeding structure 54, a microphone 56, ashielding layer 57, a sensor 58, and a connector 59.

The substrate 50 has a surface 50 b and a surface 50 u opposite thesurface 50 b.

The semiconductor device 51 can be disposed on the surface 50 b of thesubstrate 50. The electronic component 52 can be disposed on the surface50 b of the substrate 50. The encapsulant 53 can encapsulate theelectronic component 51 on the surface 50 b of the substrate 50. Theencapsulant 53 can encapsulate the electronic component 52 on thesurface 50 b of the substrate 50. The shielding layer 57 is disposed onthe encapsulant 53 to separate the semiconductor device package 5 fromthe battery 11 or 21 as shown in FIGS. 1A and 2A.

The feeding structure 54 can be disposed on the surface 50 u of thesubstrate 50 and is devoid of encapsulant or molding material. Thefeeding structure 54 is exposed on the surface 50 u of the substrate 50.The surface 50 u of the substrate 50 is devoid of encapsulant or moldingmaterial. Electronic components 55 are disposed on both surfaces 50 band 50 u of the substrate 50. The microphone 56 is disposed on thesurface 50 u. The microphone 56 may include a semiconductor devicepackage. The microphone 56 may include a microelectromechanical systems(MEMS) device. The microphone 56 may include a microelectromechanicalsystems (MEMS) device package. The microphone 56 is exposed. The sensor58 is disposed on the surface 50 u of the substrate 50. The connector 59is disposed on the surface 50 u of the substrate 50. The surface 50 bincludes conductive pads for battery connection. The surface 50 bincludes conductive pads for speaker driver connection. The feedingstructure 54 has a surface 54 u higher than the microphone 56. Thesurface 54 u is higher than the sensor 58. The surface 54 u is higherthan the connector 59. The feeding structure 54 is the highest amongelements disposed on the surface 50 u of the substrate 50.

The electronic components 51 and 52 may include one or more ofapplication processors, memories, digital signal processors,coders/decoders, power management integrated circuits, DC converters,low dropout outputs or filters. The encapsulant 53 may include differentkinds of molding materials. The feeding structure 54 includes a springor a conductive pin. The feeding structure 54 includes a POGO pin. Thefeeding structure 54 also includes an antioxidation layer. The feedingstructure 54 is configured to and can be used to feed a radio frequency(RF) signal to an antenna. The electronic components 55 may include oneor more of resistors, inductors or capacitors. The sensor 58 may includea G-sensor or other sensors. The connector 59 includes a zero insertionforce connector or a board-to-board connector for peripheral functionflexible printed circuit (FPC) connection.

FIG. 6A illustrates the frequency response curve of the assembly of aset of acoustic devices as shown in FIG. 3C. The distance Z3 of theacoustic device 3 as shown in FIG. 3D can be equal to or less than 23mm. The earphone includes a speaker having a width or diameter of 6 mm.The unit of the horizontal axis is frequencies (represented with Hz).The unit of the horizontal axis is amplitudes (represented with dB) ofan acoustic device. The two curves of FIG. 6A represents frequencyresponse curves of the left earphone and the right earphone,respectively. As shown in FIG. 6A, the performance of the two earphonesare similar. Additionally, the difference D3 between the amplitude atrelatively low frequencies (about 20 Hz to 100 Hz) and the amplitude atmiddle frequencies (about 100 Hz to 1 KHz) is equal to or larger thanabout 19 db. The difference D4 between the amplitude at low frequencies(about 20 Hz to 100 Hz) is equal to or larger than about 8 db. Thesmaller the difference D3 is, the better the acoustic performance of theacoustic device 3 is. The smaller the difference D4 is, the better theacoustic performance of the acoustic device 3 is.

FIG. 6B illustrates the frequency response curve of the assembly of aset of acoustic devices as shown in FIG. 2B. The distance Z2 of theacoustic device 2 as shown in FIG. 2B can be equal to or less than 23mm. The earphone includes a speaker having a width or diameter of 10 mm.The maximum distance Z2 as shown in FIG. 2B is equal to or similar tothe maximum distance Z3 as shown in FIG. 3D. The unit of the horizontalaxis is frequencies (represented with Hz). The unit of the horizontalaxis is amplitudes (represented with dB) of an acoustic device. The twocurves of FIG. 6B represents frequency response curves of the leftearphone and the right earphone, respectively. As shown in FIG. 6B, theperformance of the two earphones are similar. Additionally, thedifference D5 between the amplitude at relatively low frequencies (about20 Hz to 100 Hz) and the amplitude at middle frequencies (about 100 Hzto 1 KHz) is equal to or less than about 14 db. The difference D6between the amplitude at low frequencies (about 20 Hz to 100 Hz) isequal to or less than about 3 db. The smaller the difference D5 is, thebetter the acoustic performance of the acoustic device 2 is. The smallerthe difference D6 is, the better the acoustic performance of theacoustic device 2 is.

FIG. 7 illustrates an exploded view of an acoustic device 7 inaccordance with some embodiments of the present disclosure. The acousticdevice 7 includes a speaker 70, a battery 71, a semiconductor devicepackage 72, an interconnect structure 73 and a housing 74. The speakerhas a surface 70 a and a surface 70 b opposite to the surface 70 a. Thebattery 71 has a surface 71 a, a surface 71 b opposite the surface 71 a,and a surface 71 c extended between the surface 71 a and the surface 71b. The battery 71 has a package different from the battery 11 as shownin FIGS. 1A and 2A. The battery 71 is connected to a protecting circuit71 d. The battery 71 includes a lithium rechargeable battery. Thebattery 71 includes an aluminum cover. The protecting circuit 71 d cancontrol the voltages and currents flowed into the battery 71. Theprotecting circuit 71 d can control the voltages and currents flowed outof the battery 71. The protecting circuit 71 d can protect the battery71 from being inflated or even exploded after working for a while.

The speaker 70 is disposed adjacent to the semiconductor device package72. The battery 71 faces with a surface 72 a of the semiconductor devicepackage 72. The speaker 70 is connected to the semiconductor devicepackage 72 by wires 75. The speaker 70 is separated from thesemiconductor device package 72 by a chamber/space S3. The housing 74encloses the speaker 70, the battery 71, the semiconductor devicepackage 72, and the interconnect structure 73. The interconnectstructure 73 connects the battery 71 and the semiconductor devicepackage 72. The interconnect structure 73 includes flexible printcircuit (FPCs) or other interconnect structures.

A maximum distance of the acoustic device 7 along the x axis can beequal to or larger than 20 mm. A maximum distance of the acoustic device7 along the y axis can be equal to or larger than 28 mm. A maximumdistance Z4 between an end 74 a (which can be fitted or plugged into anear) and an end 74 b along the z axis can be equal to or larger than 24mm.

The size of the battery 71 is dependent on temperature. As the battery71 has been working for a while, the temperature of the battery 71 willincrease, which causes the size of the battery 71 to increase.Therefore, a relatively great space (not denoted in FIG. 7 ) foraccommodating the battery 71 is included because the battery 71 willinflate after use. Accordingly, the distance between the battery 71 andthe semiconductor device package 72 will increase. The distance betweenthe battery 71 and the semiconductor device package 72 will increase.

Assuming a lithium rechargeable battery with aluminum cover is used asthe battery 71, the capacity of the battery 71 may be less than 50 mAh.For example, the battery 71 may include capacity of approximately 45mAh.

Furthermore, a relatively great space (not denoted in FIG. 7 ) foraccommodating the battery 71 is included because the battery 71 willinflate after use. Assuming the battery 11 includes a capacity similarto that of the battery 71, the size of the acoustic device 7 includingthe battery 71 may be larger than that of the acoustic device 1including the battery 11.

Spatial descriptions, such as “above,” “below,” “up,” “left,” “right,”“down,” “top,” “bottom,” “vertical,” “horizontal,” “side,” “higher,”“lower,” “upper,” “over,” “under,” and so forth, are indicated withrespect to the orientation shown in the figures unless otherwisespecified. It should be understood that the spatial descriptions usedherein are for purposes of illustration only, and that practicalimplementations of the structures described herein can be spatiallyarranged in any orientation or manner, provided that the merits ofembodiments of this disclosure are not deviated from by such anarrangement.

As used herein, the terms “approximately,” “substantially,”“substantial” and “about” are used to describe and account for smallvariations. When used in conjunction with an event or circumstance, theterms can refer to instances in which the event or circumstance occursprecisely as well as instances in which the event or circumstance occursto a close approximation. For example, when used in conjunction with anumerical value, the terms can refer to a range of variation less thanor equal to ±10% of that numerical value, such as less than or equal to±5%, less than or equal to ±4%, less than or equal to ±3%, less than orequal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%,less than or equal to ±0.1%, or less than or equal to ±0.05%. Forexample, a first numerical value can be deemed to be “substantially” thesame or equal to a second numerical value if the first numerical valueis within a range of variation of less than or equal to ±10% of thesecond numerical value, such as less than or equal to ±5%, less than orequal to ±4%, less than or equal to ±3%, less than or equal to ±2%, lessthan or equal to ±1%, less than or equal to ±0.5%, less than or equal to±0.1%, or less than or equal to ±0.05%. For example, “substantially”perpendicular can refer to a range of angular variation relative to 90°that is less than or equal to ±10°, such as less than or equal to ±5°,less than or equal to ±4°, less than or equal to ±3°, less than or equalto ±2°, less than or equal to ±1°, less than or equal to ±0.5°, lessthan or equal to ±0.1°, or less than or equal to ±0.05°.

Two surfaces can be deemed to be coplanar or substantially coplanar if adisplacement between the two surfaces is no greater than 5 μm, nogreater than 2 μm, no greater than 1 μm, or no greater than 0.5 μm. Asurface can be deemed to be substantially flat if a displacement betweena highest point and a lowest point of the surface is no greater than 5μm, no greater than 2 μm, no greater than 1 μm, or no greater than 0.5μm.

As used herein, the singular terms “a,” “an,” and “the” may includeplural referents unless the context clearly dictates otherwise.

As used herein, the terms “conductive,” “electrically conductive” and“electrical conductivity” refer to an ability to transport an electriccurrent. Electrically conductive materials typically indicate thosematerials that exhibit little or no opposition to the flow of anelectric current. One measure of electrical conductivity is Siemens permeter (S/m). Typically, an electrically conductive material is onehaving a conductivity greater than approximately 10⁴ S/m, such as atleast 10⁵ S/m or at least 10⁶ S/m. The electrical conductivity of amaterial can sometimes vary with temperature. Unless otherwisespecified, the electrical conductivity of a material is measured at roomtemperature.

Additionally, amounts, ratios, and other numerical values are sometimespresented herein in a range format. It is to be understood that suchrange format is used for convenience and brevity and should beunderstood flexibly to include numerical values explicitly specified aslimits of a range, but also to include all individual numerical valuesor sub-ranges encompassed within that range as if each numerical valueand sub-range is explicitly specified.

While the present disclosure has been described and illustrated withreference to specific embodiments thereof, these descriptions andillustrations are not limiting. It should be understood by those skilledin the art that various changes may be made and equivalents may besubstituted without departing from the true spirit and scope of thepresent disclosure as defined by the appended claims. The illustrationsmay not be necessarily drawn to scale. There may be distinctions betweenthe artistic renditions in the present disclosure and the actualapparatus due to manufacturing processes and tolerances. There may beother embodiments of the present disclosure which are not specificallyillustrated. The specification and drawings are to be regarded asillustrative rather than restrictive. Modifications may be made to adapta particular situation, material, composition of matter, method, orprocess to the objective, spirit and scope of the present disclosure.All such modifications are intended to be within the scope of the claimsappended hereto. While the methods disclosed herein have been describedwith reference to particular operations performed in a particular order,it will be understood that these operations may be combined,sub-divided, or re-ordered to form an equivalent method withoutdeparting from the teachings of the present disclosure. Accordingly,unless specifically indicated herein, the order and grouping of theoperations are not limitations of the present disclosure.

As used herein, spatially relative terms, such as “beneath,” “below,”“lower,” “above,” “upper,” “lower,” “left,” “right” and the like, may beused herein for ease of description to describe one element or feature'srelationship to another element(s) or feature(s) as illustrated in thefigures. The spatially relative terms are intended to encompassdifferent orientations of the device in use or operation in addition tothe orientation depicted in the figures. The apparatus may be otherwiseoriented (rotated 90 degrees or at other orientations) and the spatiallyrelative descriptors used herein may likewise be interpretedaccordingly. It should be understood that when an element is referred toas being “connected to” or “coupled to” another element, it may bedirectly connected to or coupled to the other element, or interveningelements may be present.

The foregoing outlines features of several embodiments and detailedaspects of the present disclosure. The embodiments described in thepresent disclosure may be readily used as a basis for designing ormodifying other processes and structures for carrying out the same orsimilar purposes and/or achieving the same or similar advantages of theembodiments introduced herein. Such equivalent constructions do notdepart from the spirit and scope of the present disclosure, and variouschanges, substitutions, and alterations may be made without departingfrom the spirit and scope of the present disclosure.

What is claimed is:
 1. A wireless earphone, comprising: a semiconductordevice package; a battery, wherein the semiconductor device package andthe battery are arranged along a first axis of the wireless earphone; aspeaker, wherein the battery and the speaker are arranged along a secondaxis of the wireless earphone substantially perpendicular to the firstaxis; and a housing encapsulating the semiconductor device package, thebattery, and the speaker; wherein the battery has a planar surface and acurved surface, wherein the planar surface faces the speaker; whereinthe semiconductor device package is disposed over the curved surface ofthe battery and the speaker is disposed over the planar surface of thebattery; wherein the housing has a first surface extending upwardly froman end of the wireless earphone configured to be plugged into an earcanal to a top end of the housing and a second surface extendingdownwardly from the end of the wireless earphone to a bottom end of thehousing; wherein a first slope of the first surface of the housing ishigher than a second slope of the second surface of the housing; whereina first curvature of the first surface of the housing is different froma second curvature of the second surface of the housing; wherein thesemiconductor device package is disposed in a first space of thehousing, wherein the speaker and the battery are disposed in a secondspace of the housing different from the first space, and wherein thefirst surface of the housing overlaps the first space and the secondspace in a direction along the second axis; and wherein the secondsurface of the housing overlaps the second space but does not overlapthe first space in the direction along the second axis.
 2. The wirelessearphone of claim 1, wherein the speaker is disposed between the planarsurface of the battery and the end of the wireless earphone configuredto be plugged into the ear canal.
 3. The wireless earphone of claim 2,wherein a projection of the speaker on the battery along the second axisis entirely within the planar surface of the battery.
 4. The wirelessearphone of claim 3, wherein the semiconductor device package and theplanar surface of the battery are not overlapped along the first axisand the second axis.
 5. The wireless earphone of claim 1, wherein whenthe end of the wireless earphone is plugged into the ear canal, thesemiconductor device package is higher than the end of the wirelessearphone.
 6. The wireless earphone of claim 5, wherein when the end ofthe wireless earphone is plugged into the ear canal, the semiconductordevice package is higher than the ear canal.
 7. The wireless earphone ofclaim 6, wherein when the end of the wireless earphone is plugged intothe ear canal, the semiconductor device package is disposed around alocation between the ear canal and an ear helix.
 8. The wirelessearphone of claim 1, wherein when the wireless earphone is worn on anear, a projection of the semiconductor device package on the ear and aprojection of the battery on the ear are not overlapped.
 9. The wirelessearphone of claim 1, wherein the semiconductor device package isentirely in the first space of the housing; wherein the speaker and thebattery are entirely in the second space of the housing; and wherein theend of the wireless earphone configured to be plugged into the ear canalis in the second space of the housing.